I'll go first....
I am a Hendrix and Trower fan. Univibe!!!
The Phasor got old and boring within a few days of buying it. It sat unused. I sold it and never bought another one.
The Flanger got old and boring within a few weeks of buying it. It sat unused. I sold it and never bought another one.
The Chorus sounded good, but again, I was bored. I sold it and soon regretted getting rid of it. I repeated that sequence twice more, but I kept the last chorus. I just pulled it back out after 10-15 years and put it on my "small pedalboard". It will stay there.
The Univibe has been on my main board the longest (years!!!). Changing the order of my pedals (and the electrical connection) seems to have solved a noise problem I have been having.